JPH11333658A - Boring tool having chip receiving cover body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a boring tool having a chip receiving cover body to simplify structure, prevent the occurrence of interference by an interference part especially protruding from a body to be bored when a through hole is bored in the body to be bored, besides reliably prevent flying and falling of generated chips, and besides simply discharge the chip. SOLUTION: When a through-hole is bored in a body to be bored, interference by an interference part protruding from the body to be bored is prevented from occurring, and the through hole is bored. A so formed boring tool 20 comprises a chip covering body 8 having an opening making contact with the peripheral edge of the through-hole; and a boring blade 4 contained at the inside of the chip receiving cover body 8 and protruding as rotation is effected toward a front, and boring the through-hole in the body to be bored. A notch 7 to prevent the occurrence of interference by the interference part is formed in the chip receiving covery body 8 and a cover member 9 is mounted in a manner to cover the notch 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piercing tool used for piercing a hole in a body to be pierced, and more particularly, to a piercing tool having a simple structure and having a hole in a body to be pierced. Especially when drilling, it is possible to avoid interference due to interference parts protruding from the body to be drilled, and also to prevent spilling and spilling of generated chips reliably, and easily remove the chips. The present invention relates to a perforator provided with a chip receiving cover body.

[0002]

2. Description of the Related Art Conventionally, as a piercing tool for forming a large-diameter through hole in a body to be pierced, such as a ceiling material or a wall material, etc.
A wide variety of drills have been developed and are commercially available. In order to smoothly drill a large-diameter hole, a drilling tool generally called a forsaw or a core drill, which is a combination of a cylindrical core body provided with a drilling blade on the periphery of the opening and a center drill, is widely used. I have.

[0003] Further, as a piercing tool having a chip receiving cover body capable of preventing scattering of chips (chips) generated during the operation of piercing a through-hole in a body to be pierced, for example, Japanese Utility Model Publication No. Sho 6
Japanese Patent Application Laid-Open No. 1-28653, JP-A-9-3
A piercing tool described in JP 09015 is known.

[0004]

However, according to the above-described conventional piercing tool 50 having the chip receiving cover body 51, for example, the front surface of the box mounted at a certain distance from the pillar is transparent so as to face the wall surface. In the case of drilling a hole, the drilling can be performed without scattering chips during the drilling operation. However, for example, when the box 55 is attached to the column 52 and the column 52 projects from the wall surface 53, In addition to the fact that the work of drilling the through-hole is difficult to perform and the workability is poor, as shown schematically in FIG. Since the gap Y is formed between the opening 51a and the wall surface 53, there is a problem that the chips leak from the gap Y and scatter around the entire surface.

[0005] In the case where a through hole is formed in the ceiling wall near the wall of the upright wall, there is the same problem as described above.

The present invention has been devised in view of the above situation, and has as its object to solve the above-mentioned disadvantages and problems of a conventional piercing tool having a chip receiving cover body. It is to be. The object is to have a simple structure and to avoid interference due to an interference portion that particularly protrudes from the drilled body when drilling a through-hole in the drilled body, and furthermore, generates chips. It is an object of the present invention to provide a piercing tool provided with a swarf receiving cover body, which can surely prevent splattering and spilling of the swarf, and can easily remove the swarf.

[0007]

The gist of the means adopted by the present invention to solve the above-mentioned problems is as described in the appended claims.

[0008] According to the piercing tool provided with the chip receiving cover body according to each of the claims adopting such a configuration, first, the front surface of the box attached to the wall surface at a certain distance from the interfering portion such as a pillar is placed on the wall surface. When drilling a through hole to allow access, it can be used with the cover member attached to the notch, so that chips generated when drilling the through hole are collected inside the chip receiving cover body. The through-holes can be perforated while preventing the chips from falling off. That is, it is possible to prevent chips from being dissipated when a through hole is formed in a wall material at a work site, and to prevent scattering of chips at the work site.

Further, for example, in the case where a through hole is formed in the ceiling wall so that the front surface of the box fixed to the ceiling wall faces the wall surface, when the box is close to the pillar side or fixed to the wall of the upright wall. Or when the column projects from the wall surface (perforated body) to form an interference portion, and the interference portion hinders the opening of the cover body from being brought into close contact with the perforated body. For example, the cover member can be removed from the notch, for example, and the notch can be arranged at the position of the interference portion of the pillar. A through hole can be formed with respect to.

[0010] In particular, in the piercing device according to the fourth aspect, the lid member itself is configured to be extendable and retractable, and in the piercing device according to the fifth aspect, the lid member itself is elastically movable forward and backward. Since it is supported, in addition to the above-described operation, in particular, even if the height of the interference portion is different, it is possible to freely cope with the difference.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the invention according to each of the above claims will be described based on an embodiment, and the piercing tool according to each claim has a structure in which a chip receiving cover body provided in the piercing tool has a structure. It has features. Hereinafter, the structure of the chip receiving cover body will be mainly described. FIG. 1 is a partially cutaway view showing a piercing device 20 of the first embodiment, FIG. 2 is an exploded perspective view of a chip receiving cover body 8 attached to the piercing device 20,
FIG. 3 is a partially cutaway front view of the chip receiving cover body 8 shown in FIG. 2, and FIG. 4 is a sectional view taken along line AA of FIG.

The piercing tool 20 includes a rotating shaft 1 whose tip is detachably attached to a rotary driving tool, and which is rotatably driven by the rotary driving tool, one end of which is detachably fixed to the rotating shaft 1 and is pierced into a wall material. A center shaft 2 for providing a position of the center of the through hole to be provided, and a center through hole formed concentrically with the position of the center of the through hole, the lower part of the rotary shaft being removably inserted into the center through hole. A main body block 6 comprising: a rotating body 5 having a perforated blade 4 fitted and fixed via blade body brackets 3 attached to opposing sides separated by a predetermined distance from the center through hole; A cup-shaped side wall that covers the entire body 5 and a cylindrical portion formed integrally with the upper portion of the side wall and having an insertion hole through which the rotation shaft is inserted. A chip receiving cover body 8 having a notch 7; A lid member 9 provided so as to cover the entire 7, cutting depth adjusting device 10 is fixed to the upper surface of the cover member 8 to restrict a moving distance of the main body block 6
And a configuration comprising:

The rotary shaft 1 integrally includes a holding portion detachably attachable to a rotary driving tool, and a housing having a cylindrical space extending from the holding portion and having an open end. A mounting portion is formed at the center, which can be removably inserted into a mounting portion formed on the center shaft 2 described later.
Also, a coil spring (elastic body) is provided inside the housing, which constantly urges the center shaft in the protruding direction by a resilient force and which can be immersed in the housing against the resilient force. Have been. This spring has one end elastically supported by the inner bottom surface of the housing and the other end elastically supported by an attached portion formed on the center shaft.

The center shaft 2 has, at one end, a mounting portion formed in a shape corresponding to a mounting portion formed on the housing, and the mounting portion is formed on the rotating shaft. The attached attachment portion is detachably attached, and can be fixed to the rotating shaft 1 so as to rotate idly by a stopper ring. A tip 2a is integrated with the other end of the center shaft 2. The point 2a is formed so that it can enter the surface of the body to be drilled.

The rotating body 5 is formed with nut-shaped fixing portions at opposing opposite positions separated from the center through-hole by a predetermined distance. Can be bolted.

That is, although the center shaft 2 is attached to the rotating shaft 1 and is rotatable, and is urged in the projecting direction by the restoring force of a coil spring housed in the rotating shaft, the center shaft 2 is different from the present invention. When the entire piercing tool 20 is pressed against the body to be pierced, the point 2a enters the surface of the body to be pierced, and the center shaft 2 is pressed against the resilient force of the spring in the rotating shaft 1 with the tip 2a as it is. The tip 2a can be inserted into the surface of the body to be drilled so that the center of the center of the hole to be bored in the body to be bored is not shifted. It works as a prevention.

The blade bracket 3 is integrally formed in a substantially rectangular parallelepiped shape, a female screw is threaded on an outer side wall, and a bolt head of a bolt 11 screwed to the female screw and the blade bracket 3 are formed. The perforation blade 4 is sandwiched between the side walls of the piercing blade. Further, a long through hole is formed in the center of the blade bracket 3, and the tip of a bolt provided through the through hole is screwed to a fixing portion formed in the nut shape, so that It is configured to be fixed to both sides of the rotating body 5.

However, the shape and quantity of the blade bracket 3 to be attached to the rotating body 5 are not limited, and each of the perforated blades 4 is not limited.
May be fixed so as to draw the same circular locus about the center of the center shaft 2. Needless to say, these can be changed in design as appropriate.

It is preferable that the cutting edge of the piercing blade 4 is formed in a V-shape, since the sharpness when piercing the wall material is good.

As shown in the figure, the chip receiving cover body 8 has a notch 7 formed by cutting out a part of the side wall, and an engaging portion 7a formed at the upper end edge of the notch 7 is formed. , An engaging portion 7b provided on the lid member 9 can be detachably fitted so as to cover the whole. Therefore, the end surface of the side wall is brought into contact with the peripheral edge of the through hole to be pierced with respect to the pierced body, such as a wall material or a ceiling material, and the hole is pierced from the end surface of the cover body 8 toward the front from the end surface as it is. When the blade 4 is protruded while being rotated, it functions so as to prevent scattering of chips generated when the through hole is formed.

If a scrap catcher 12 is provided on the side wall of the chip receiving cover body 8 and a tapered dropping surface is formed at the open end thereof (not shown), a through hole is formed in the body to be drilled. It is particularly preferable that the chips produced during the installation can be surely moved toward the scrap catcher 12 without collecting around the open end of the scrap catcher 12 and dropped into the scrap catcher 12.

The cutting depth adjusting device 10 employs a "cutting depth adjusting device in a rotary cutting tool" described in Japanese Utility Model Publication No. Sho 59-43045 filed by the applicant of the present invention. An axially helical slope is formed. A lower slider is rotatably fitted to a cylindrical portion of a main body provided with legs at the lower part of the lower cylindrical cylinder, and a sliding element is provided on the upper part so as to be slidable in the axial direction. It is configured to protrude from the body to correspond to the spiral slope of the rotary cylinder.

Next, the operation obtained by the chip receiving cover 8 of this embodiment will be described.

First, the wiring box 15 placed behind the wall
When a through-hole is formed in the wall material 23 erected on the front surface so that one side of the wall material faces the wall surface, the notch 7 is covered with the cover member 9 and the entirety is formed in the wall material 23. When pressed toward the housing, the center shaft 2 is always urged toward the projecting direction of the center shaft 2 by the coil spring provided in the housing. Can be immersed inward,
Then, the end face of the cover body 8 can be brought into contact with a position outside the periphery of the through hole to be bored.

Next, while the hand-held rotary drive tool is rotationally driven, the whole of the piercing tool 20 is further pushed toward the wall material, and the tip 2a is kept in the surface of the wall material 23. Only the perforation blade 4 can be advanced, a perforation can be perforated in the wall material 23 by the perforation blade 4, and a part of one side of the wiring box 15 arranged on the back of the wall can face the wall surface. .

On the other hand, as schematically shown in FIG. 5, for example, the column 22 projects from the wall surface 23 (the body to be pierced) and
When the interference part 25 is in the way and the opening of the cover body 8 cannot be brought into close contact with the perforated body 23, the cover member 9 is removed from the notch 7 and projected from the pillar 22. When the notch 7 is arranged at the position of the interference portion 25, the entire opening of the cover body 8 can be brought into close contact with the perforated body 23, and the same operation as described above can be performed. That is, it is possible to easily drill a beautifully finished through-hole with respect to the body to be drilled 23 while avoiding the interference by the interference portion 25 without scattering chips around the hole.

By the way, the method of attaching the lid member 8 to the notch 7 described above can be changed to various methods described below.

First, a guide path is formed at a peripheral portion of a notch formed by cutting a part of a side wall, and a double door that can be opened and closed on both right and left sides by being guided by the guide path can be provided. Further, it is also possible to adopt a configuration in which the guide opening is guided by the guide path so as to open one side. Furthermore, it may be attached as a double door structure.

In this embodiment, that is, all of the piercing tools having a chip receiving cover body to which a lid member that can be opened and closed are attached, correspond to claim 2 described above.

As schematically shown in FIG. 6, a lid member 30 having a plurality of plate members 35 having a locking portion 31 at one end and a locked portion 32 at the other end is cut off. Chip 7
Can be attached so as to cover the entirety. When such a configuration is employed, as shown in FIG. 6, the lid member 30 itself can be freely expanded and contracted. Therefore, in addition to the above-mentioned effects, a special effect is obtained that, in particular, even if the height of the interference portion 25 is different, the interference portion 25 can be flexibly handled.

In this embodiment, that is, all of the piercing tools having a chip receiving cover body with a cover member which can be freely expanded and contracted correspond to claim 4.

Further, as schematically shown in FIGS. 7 and 8, a cover member 40 is provided with a guide pin 47, and a spring 45 mounted in a guide cylinder 43 formed in the cover body 41.
Thus, the entire structure can be configured as a supporting structure. When such a configuration is adopted, the lid member 40
It is possible to freely extend and retract itself toward the rear, and in this case as well, a special action is obtained in that even if the height of the interference portion 25 is different, the interference portion 25 can be responded to accordingly.

In this embodiment, that is, all of the piercing tools having a chip receiving cover body having a cover member which can be freely extended and retracted correspond to claim 5.

Finally, the above-described openable / detachable lid member may be attached to the notch formed by cutting the side wall like a radish. When such a configuration is adopted, for example, when a through hole is formed in the ceiling wall so that the front surface of the box fixed to the ceiling wall faces the wall surface, or when the box is close to the column side or when the box is When the lid member is removed from the notch when fixed to the side of the wall, the notch can be arranged so as to be located near the wall of the standing wall, and the distance from the pillar or the standing wall to the drilling blade can be reduced, The same operation as above can be performed.
That is, even if the box is close to the pillar side or fixed to the wall of the standing wall, the through hole can be extremely easily drilled without being interfered by these pillars and the standing wall. A piercing tool having a chip receiving cover body according to such an embodiment is also included in claim 1.

In practicing the present invention, various design changes can be made without departing from the scope of the present invention. For example, the notch, the dimensions, the material, and the like of the cover are all items that can be appropriately changed in design.

Finally, there are various embodiments of the method of using the piercing device of the present invention described above. For example, by directly drilling a through hole in the wall material covering the front surface, the cable placed on the back of the wall or the wiring equipment connected to the cable is pulled out to the wall surface and exposed to the wall surface, wiring Fixing to a wall material with an instrument mounting frame interposed can be more specifically exemplified.

[0037]

As described in detail above, the piercing tool provided with the chip receiving cover according to the present invention has a simple structure,
The following operation and effect can be obtained.

First, in the case where a through-hole is formed so that the front surface of a box attached to a wall or the like, which is attached at a certain distance from a pillar or an upright wall, faces a wall surface, the box can be used with a cover member attached to a notch. It is possible to perforate the through hole while collecting the chips generated when the through hole is formed inside the chip receiving cover body (while preventing the chips from falling off). That is, it is possible to prevent chips from being dissipated when a through hole is formed in a wall material at a work site, and to prevent scattering of chips at the work site.

For example, in the case where a through hole is formed in the ceiling wall so that the front surface of the box fixed to the ceiling wall faces the wall surface, when the box is close to the pillar side or fixed to the wall of the upright wall. Or when the column projects from the wall surface (perforated body) to form an interference portion, and the interference portion hinders the opening of the cover body from being brought into close contact with the perforated body. By removing the lid member from the notch and disposing the notch at the position of the pillar or the standing wall (interference portion), all the openings of the cover body can be brought into close contact with the body to be perforated. In particular, the through-hole can be perforated in the body to be pierced while avoiding interference by an interference portion projecting from the body to be pierced.

In particular, in the piercing device according to the fourth aspect, the lid member itself is configured to be able to expand and contract, and in the piercing device according to the fifth aspect, the lid member itself is elastically movable forward and backward. Because it is supported, in addition to the above-described action, it can be provided as an excellent one that can freely cope with even if the height of the interference part is different.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing a punch according to the present invention.

FIG. 2 is an exploded perspective view mainly showing an appearance of a chip receiving cover attached to the drilling tool shown in FIG. 1;

FIG. 3 is a partially cutaway front view of the chip receiving cover body shown in FIG. 2;

FIG. 4 is a cross-sectional view taken along line AA of FIG.

FIG. 5 is a cross-sectional view schematically showing a state in which a through-hole is drilled in a body to be pierced corresponding to a wiring box using one piercing tool according to the present invention. The body has interference parts.

FIG. 6 is a cross-sectional view schematically showing only the extendable lid member portion. FIG. 6 (a) shows a fully extended state, and FIG. 6 (b) shows a retracted state. The state is shown.

FIG. 7 is a partially cutaway front view schematically showing a main part of another piercing tool according to the present invention.

FIG. 8 is a sectional view taken along the line AA of FIG. 7;

FIG. 9 is a cross-sectional view schematically illustrating a problem of a conventional drill.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Rotating shaft 2 ... Center shaft 2a ... Pointed end 3 ... Blade body bracket 4 ... Drilling blade 5 ... Rotating body 6 ... Notch 7a ... Locking part 7b ... Engaging part 8 ... Chip receiving cover body 9 ... Cover member 10 ... Cut depth adjusting device 11 ... Bolt 12 ... Scrap catcher 15 ... Wiring box 20 ... Punching tool 22 ... Pole 23 ... Wall material (wall surface, perforated body) 25 ... Interference part 30 ... Cover member 31 ... Stop part 32 ... Locked part 35 ... Plate member 35 40 ... Lid member 41 ... Cover body 43 ... Guide cylinder 45 ... Spring 47 ... Guide pin 50 ... Conventional one-drilling tool 51 ... Chip receiving cover body 51a ... Opening 52 ... pillar 53 ... wall surface 55 ... wiring box Y ... gap

Claims (5)

[Claims] 1. A piercing tool for piercing a through hole in an object to be pierced when avoiding interference by an interference portion protruding from the piercing object when the hole is pierced. A chip receiving cover body having an opening that abuts, and a punching blade that is housed inside the chip receiving cover body and that protrudes while rotating forward and perforates the through-hole with respect to the perforated body. A notch formed in the chip receiving cover body for avoiding interference by the interference portion, and a lid member is attached so as to cover the notch; Punch with body. 2. The chip receiving cover according to claim 1, wherein in the drilling tool provided with the chip receiving cover body, the lid member is attached to the notch so as to be openable and closable. Punch with body. 3. The chip receiving cover according to claim 1, wherein the cover member is detachably attached to the notch in the drilling tool provided with the chip receiving cover body. Punch with body. 4. A piercing tool provided with the chip receiving cover body, wherein the lid member includes a plurality of plate members having a locking portion at one end and a locked portion at the other end. The piercing tool provided with a chip receiving cover body according to claim 1, wherein the piercing tool is attached to the powder receiving cover body so as to be able to expand and contract. 5. The piercing tool provided with the chip receiving cover body, wherein the lid member is supported by the chip receiving cover body so as to be able to advance and retreat. A piercing tool provided with a chip receiving cover body.